RRosternomics
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Billy Eppler

Born Sep 16, 1975 · San Diego, CA · age 50

General manager for the Angels and Mets (2016–2023).

7 seasons with salary-era data across 2 stints. All figures are franchise-level outcomes during the tenure, not solely attributable to one executive.

Overview

Titles0
Pennants0
Playoffs1
Record508–524
Win %0.492
-3.2GM WAR — wins above a replacement GM (org-adjusted, shrunk; per season) ±5.4152nd/195 execs
5.6Depth — 2+ WAR regulars per season (the breadth that drives TAB, not stars)128th/195 execs
-6.8Dead WAR — WAR/yr bled by sub-replacement players (closer to 0 = better)173rd/195 execs
42%Dead money — payroll on <0.5-WAR players (lower = better)148th/195 execs
$18MCheap-talent surplus — $/yr of value from cost-controlled (pre-arb/arb) players above their pay; the selection engine, and the stickiest GM skill we track79th/195 execs
$13MDrafted surplus — cheap-talent surplus from his own draftees (the develop-from-the-draft engine)46th/195 execs
$2MTraded-for surplus — cheap-talent surplus from cost-controlled players he acquired via trade112th/195 execs
$1MInt'l surplus — cheap-talent surplus from his own international signees93rd/195 execs
-35.6TAB — talent above budget — roster-construction alpha (talent your budget bought above expectation), tenure total166th/195 execs
-32.5WAB — realized wins (TAB + the non-repeatable luck of converting talent to wins)164th/195 execs
2.47Acquisition Leverage — playoff pts per acquired WAR, graded once in the year each deal's wins arrive (the repeatable decision skill)67th/195 execs
-523Roster surplus $M191st/195 execs

Tenure breakdown

TeamRoleYearsSzns WAB WAB/yr TAB WAR surp HG Trade FA R5 AcqLev W-L% POPenWS Surp $M
▸ Mets GM 2022–2023 2 -2.4 -1.22 -0.3 -54.0 +17.4 -1.1 -19.1 +0.0 3.48 0.543 1–– -208
▸ Angels GM 2016–2020 4 -30.1 -7.52 -35.3 -82.8 +45.3 +26.1 -26.1 -0.1 1.91 0.469 ––– -315
Career total (1985+ data) 7 -32.5 -35.6 -136.8 +62.7 +25.0 -45.3 -0.1 2.47 0.492 1– – -523

Roster Construction

How the roster was sourced

by valueby volume

Share of acquired fWAR by channel vs. league average.

Build channels — net fWAR

Acquired minus surrendered / signed minus walked.

Home-grown (draft/intl)+62.7
Trade+25.0
Free agency-45.3
Rule 5 / minor draft-0.1
Sourcing mix: 61% draft · 13% FA · 26% trade · 0% R5

Roster value distribution — career average — depth vs. stars

Every roster slot ranked best→worst by WAR, averaged across Billy Eppler's seasons. Bars = his rosters; the black line = the league-average player at each slot. Staying above the line deep into the roster is the depth edge.

Players acquired — 165 players, by realized fWAR for the franchise (scroll for more)

PlayerPosTeam How Year Szns fWAR WAR/yr Lev
Shohei Ohtani DH ANA Draft 2018 5 +31.3 +6.3 –
Andrelton Simmons SS ANA Trade 2016 5 +14.6 +2.9 0.7
Reid Detmers P ANA Draft 2020 5 +9.4 +1.9 –
Patrick Sandoval P ANA Trade 2018 5 +8.9 +1.8 –
Francisco Álvarez C NYM Draft 2022 5 +7.9 +1.6 –
Edwin Díaz P NYM Free agency 2022 6 +6.1 +1.0 0.1
Max Scherzer P NYM Trade 2022 2 +5.5 +2.8 20.8
Starling Marte OF NYM Trade 2022 3 +4.5 +1.5 15.6
Kodai Senga P NYM Draft 2023 3 +4.3 +1.4 –
Griffin Canning P ANA Draft 2017 5 +4.2 +0.8 –
Max Stassi C ANA Trade 2019 2 +4.0 +2.0 10.7
Luis Rengifo 2B/3B ANA Trade 2018 5 +3.9 +0.8 –
Anthony Rendon 3B ANA Free agency 2019 4 +3.8 +1.0 23.6
Mark Canha OF NYM Trade 2022 2 +3.3 +1.7 10.7
Chris Bassitt P NYM Trade 2022 1 +2.8 +2.8 12.4
Justin Upton OF ANA Trade 2017 3 +2.6 +0.9 0.2
Jose Quintana P NYM Free agency 2022 2 +2.6 +1.3 –
Félix Peña P ANA Trade 2018 3 +2.6 +0.9 3.8
Jose Iglesias SS NYM Free agency 2023 1 +2.5 +2.5 6.6
Yunel Escobar 3B/SS ANA Trade 2016 2 +2.4 +1.2 0.4
Brooks Raley P NYM Trade 2023 4 +2.4 +0.6 0.5
Brett Baty 3B NYM Draft 2022 3 +2.3 +0.8 –
Hansel Robles P ANA Trade 2018 2 +2.3 +1.2 1.6
Ty Buttrey P ANA Trade 2018 2 +2.2 +1.1 –
Yusmeiro Petit P ANA Free agency 2017 1 +2.1 +2.1 0.8
Luis Severino P NYM Free agency 2023 1 +2.1 +2.1 5.6
Dylan Bundy P ANA Trade 2020 2 +2.1 +1.1 19.2
Carlos Carrasco P NYM Trade 2022 1 +2.1 +2.1 10.9
Eduardo Escobar 3B NYM Trade 2022 2 +2.1 +1.0 8.1
Brian Goodwin OF ANA Trade 2019 2 +2.0 +1.0 1.4
Justin Verlander P NYM Trade 2023 1 +1.9 +1.9 1.4
Tommy La Stella 2B/3B ANA Trade 2018 2 +1.8 +0.9 1.3
Ricky Nolasco P ANA Trade 2016 2 +1.8 +0.9 0.3
Blake Parker P ANA Trade 2017 2 +1.6 +0.8 0.6
José Buttó P NYM Draft 2022 3 +1.5 +0.5 –
Adam Ottavino P NYM Free agency 2022 2 +1.5 +0.8 4.7
Tyrone Taylor OF NYM Trade 2023 2 +1.5 +0.8 2.7
Ian Kinsler 2B ANA Trade 2018 1 +1.5 +1.5 4.2
Jhoulys Chacín P ANA Trade 2016 1 +1.5 +1.5 0.4
Taylor Cole P ANA Free agency 2018 2 +1.4 +0.7 1.3
Cameron Maybin OF ANA Trade 2017 1 +1.4 +1.4 0.6
Mark Vientos 3B/DH NYM Draft 2022 2 +1.2 +0.6 –
Noé Ramirez P ANA Trade 2017 3 +1.2 +0.4 0.1
Luisangel Acuña 2B/SS NYM Trade 2023 2 +1.1 +0.5 –
David Hernandez P ANA Trade 2017 1 +1.0 +1.0 0.4
Alex Meyer P ANA Trade 2016 2 +0.9 +0.5 0.1
César Puello OF ANA Trade 2017 2 +0.8 +0.4 0.0
Mike Mayers P ANA Trade 2020 2 +0.8 +0.4 8.9
David Robertson P NYM Trade 2023 1 +0.8 +0.8 0.6
Eric Young OF ANA Free agency 2017 2 +0.7 +0.3 0.3
J. C. Ramírez P ANA Trade 2016 3 +0.7 +0.2 0.0
Brandon Marsh OF ANA Draft 2016 2 +0.6 +0.3 –
Bud Norris P ANA Free agency 2017 1 +0.6 +0.6 0.2
Sean Reid-Foley P NYM Free agency 2022 3 +0.6 +0.2 0.4
DJ Stewart OF NYM Free agency 2023 1 +0.6 +0.6 0.6
René Rivera C ANA Trade 2018 1 +0.6 +0.6 1.8
Parker Bridwell P ANA Trade 2017 1 +0.5 +0.5 0.4
Chris Rodriguez P ANA Draft 2016 1 +0.5 +0.5 –
Andrew Wantz P ANA Draft 2018 2 +0.5 +0.2 –
Austin Warren P ANA Draft 2018 1 +0.5 +0.5 –
Geovany Soto C ANA Trade 2016 1 +0.5 +0.5 0.1
Dustin Garneau C ANA Trade 2019 1 +0.5 +0.5 0.4
Jacob Barnes P ANA Free agency 2019 1 +0.4 +0.4 3.9
Tim Locastro OF NYM Free agency 2023 1 +0.4 +0.4 0.3
Ronny Mauricio 2B/3B NYM Draft 2023 2 +0.4 +0.2 –
Joely Rodríguez P NYM Trade 2022 1 +0.4 +0.4 1.7
Trevor Gott P NYM Trade 2023 1 +0.4 +0.4 0.3
Matt Andriese P ANA Trade 2020 1 +0.3 +0.3 3.0
Ben Revere OF ANA Free agency 2016 1 +0.3 +0.3 0.1
Rafael Ortega OF NYM Free agency 2023 1 +0.3 +0.3 0.2
Deolis Guerra P ANA Trade 2016 1 +0.3 +0.3 0.1
Michael Pérez C NYM Free agency 2023 2 +0.2 +0.1 0.0
Dan Vogelbach 1B/DH NYM Trade 2022 2 +0.2 +0.1 3.8
Jason Castro C ANA Trade 2020 1 +0.2 +0.2 2.2
Blake Wood P ANA Trade 2017 1 +0.2 +0.2 0.1
Andrew Bailey P ANA Free agency 2016 2 +0.1 +0.0 0.0
Jesse Chavez P ANA Free agency 2016 1 +0.1 +0.1 0.0
Ryan Schimpf 2B/3B ANA Trade 2018 1 +0.1 +0.1 0.4
Elliot Soto 2B/SS ANA Trade 2020 1 +0.1 +0.1 –
Bryce Montes de Oca P NYM Draft 2022 1 +0.1 +0.1 –
Denyi Reyes P NYM Free agency 2022 1 +0.1 +0.1 0.1
Rafael Ortega OF ANA Trade 2016 1 +0.1 +0.1 0.0
Adalberto Mejía P ANA Trade 2019 1 +0.1 +0.1 0.1
Cody Ege P ANA Trade 2016 1 +0.1 +0.1 0.0
Tyler Naquin OF NYM Trade 2022 1 +0.1 +0.1 0.2
Vinny Nittoli P NYM Trade 2023 1 +0.1 +0.1 0.1
Jo Adell OF ANA Draft 2017 4 -0.0 -0.0 –
Cooper Criswell P ANA Draft 2018 1 +0.0 +0.0 –
José Fernández 1B ANA Trade 2018 1 +0.0 +0.0 –
Juan Graterol C ANA Trade 2017 2 -0.0 -0.0 –
Jason Gurka P ANA Free agency 2017 – -0.0 – –
Joe Hudson C ANA Trade 2018 – -0.0 – –
Kyle Keller P ANA Trade 2020 1 +0.0 +0.0 0.1
Ian Krol P ANA Free agency 2018 1 +0.0 +0.0 0.1
Jack Kruger C ANA Draft 2016 1 +0.0 +0.0 –
Damien Magnifico P ANA Trade 2017 – -0.0 – –
Osmer Morales P ANA Trade 2018 1 +0.0 +0.0 –
Matt Ramsey P ANA Trade 2019 1 +0.0 +0.0 –
Alex Claudio P NYM Free agency 2022 1 +0.0 +0.0 0.0
John Curtiss P NYM Free agency 2022 – -0.0 – –
Nate Fisher P NYM Draft 2022 – -0.0 – –
Terrance Gore DH/OF NYM Free agency 2022 1 +0.0 +0.0 0.0
Travis Jankowski OF NYM Free agency 2022 – -0.0 – –
T. J. McFarland P NYM Free agency 2022 – -0.0 – –
Adonis Medina P NYM Trade 2022 1 +0.0 +0.0 0.1
Zach Muckenhirn P NYM Draft 2023 1 +0.0 +0.0 –
Cliff Pennington 2B/SS ANA Trade 2016 1 +0.0 +0.0 0.1
Oliver Drake P ANA Trade 2018 1 +0.0 +0.0 0.0
Sam Clay P NYM Trade 2022 1 +0.0 +0.0 0.0
Phil Bickford P NYM Trade 2023 1 +0.0 +0.0 0.0
Rob Zastryzny P NYM Trade 2022 1 +0.0 +0.0 0.1
Edwin Uceta P NYM Trade 2023 1 +0.0 +0.0 0.0
Al Alburquerque P ANA Free agency 2016 – -0.1 – –
Luke Bard P ANA Rule 5 2017 1 -0.1 -0.1 –
Sam Freeman P ANA Free agency 2019 – -0.1 – –
Williams Jerez P ANA Trade 2018 – -0.1 – –
Packy Naughton P ANA Trade 2020 – -0.1 – –
Ben Rowen P ANA Free agency 2020 – -0.1 – –
Kyle Tyler P ANA Draft 2018 – -0.1 – –
Chris Young OF ANA Free agency 2018 – -0.1 – –
Grant Hartwig P NYM Draft 2023 1 -0.1 -0.1 –
Adrian Houser P NYM Trade 2023 – -0.1 – –
Deven Marrero 3B NYM Free agency 2022 – -0.1 – –
Nick Plummer DH/OF NYM Draft 2022 – -0.1 – –
Josh Walker P NYM Draft 2023 1 -0.1 -0.1 –
Jimmy Yacabonis P NYM Free agency 2022 – -0.1 – –
Ryan Buchter P ANA Free agency 2020 – -0.2 – –
Alex Claudio P ANA Free agency 2020 – -0.2 – –
Ramón Flores OF ANA Free agency 2016 – -0.2 – –
Javy Guerra P ANA Free agency 2016 – -0.2 – –
Matt Harvey P ANA Free agency 2018 – -0.2 – –
Jim Johnson P ANA Trade 2017 – -0.2 – –
John Lamb P ANA Free agency 2016 – -0.2 – –
Brooks Pounders P ANA Trade 2016 – -0.2 – –
Shane Robinson OF ANA Free agency 2016 – -0.2 – –
Brendan Ryan SS ANA Trade 2016 – -0.2 – –
Joey Wendle 2B/3B/SS NYM Free agency 2023 – -0.2 – –
Miguel Del Pozo P ANA Trade 2019 – -0.3 – –
Nolan Fontana 2B ANA Trade 2016 – -0.3 – –
Jarrett Parker OF ANA Free agency 2018 – -0.3 – –
Troy Scribner P ANA Trade 2016 – -0.3 – –
Matt Thaiss C ANA Draft 2016 1 -0.3 -0.3 –
Wilfredo Tovar SS ANA Free agency 2018 – -0.3 – –
Abraham Almonte OF NYM Free agency 2022 – -0.3 – –
R. J. Alvarez P NYM Free agency 2022 – -0.3 – –
Tommy Pham OF NYM Free agency 2023 1 -0.3 -0.3 1.1
Francisco Arcia C ANA Trade 2018 – -0.4 – –
David Huff P ANA Free agency 2016 – -0.4 – –
Hoby Milner P ANA Free agency 2019 – -0.4 – –
Scott Schebler OF ANA Free agency 2020 – -0.5 – –
Luis Valbuena 3B ANA Free agency 2017 1 -0.5 -0.5 0.1
Kean Wong 2B/OF ANA Free agency 2020 – -0.5 – –
Jefry Marte 1B ANA Trade 2016 1 -0.5 -0.5 0.2
Cody Allen P ANA Free agency 2019 – -0.6 – –
Jabari Blash OF ANA Trade 2018 – -0.6 – –
Justin Bour 1B ANA Free agency 2018 – -0.6 – –
Ji Man Choi 1B ANA Draft 2016 – -0.6 – –
Jeff Brigham P NYM Trade 2022 – -0.6 – –
Trevor Cahill P ANA Free agency 2018 – -0.7 – –
Tim Lincecum P ANA Free agency 2016 – -0.7 – –
José Rojas 3B/OF ANA Draft 2016 – -0.8 – –
Julio Teherán P ANA Free agency 2019 – -0.8 – –
Danny Mendick 2B/SS NYM Free agency 2022 – -0.9 – –
Omar Narváez C NYM Free agency 2022 1 -1.0 -1.0 0.0
Zack Cozart SS ANA Free agency 2017 – -1.4 – –

WAB = wins above what the team's payroll predicted (resource-controlled). WAR surplus = era-neutral value (WAR minus payroll in win-equivalents). Roster surplus $M = dollar value of WAR over cost. Build channels (realized fWAR): HG = home-grown via amateur draft / international signing; Trade = acquired minus surrendered (incl. purchases/waivers); FA = signed minus walked; R5 = Rule-5 / minor-league-draft pickups. Credit follows the acquisition year — home-grown to the regime at the player's draft/signing (not whoever was in the chair when he peaked), trade/FA/R5 to the GM who made the move. Players acquired as prospects before debuting (e.g. Smoltz, Bagwell; Rule-5 picks like Uggla) are counted as trade/R5, not home-grown. All are franchise-level outcomes during the stint, not solely attributable to one executive.

Graphs

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Rosternomics — quantifying front-office skill, attribution-clean. Follow @rosternomics on X. Decision-makers on record back to 1933; resource-controlled metrics (WAR & payroll) cover 1985–2026.
Data: FanGraphs (WAR), Baseball-Reference & the Chadwick Bureau register (rosters, IDs), the Lahman Database, Baseball America prospect rankings (via The Baseball Cube), and public payroll records. Transaction and trade data was obtained free of charge from and is copyrighted by Retrosheet. Executive birth/death data via Wikidata (CC0); bios are original. Emoji graphics by OpenMoji (CC BY-SA 4.0).
All figures are franchise-level outcomes credited to the decision-maker in the acquisition year — not solely attributable to one executive.